I have a copy of the book and can provide any information you need from it. It is also available for purchase for about $45 from Tuttle Antiquarian Books in Rutland VT.It is also on an LDS microfilm. You can order it to view at any Family History Center.
The book lists 7 children for Thomas K. Dow - no Fidelia. His brother William Newton Dow had 9 children - also no Fidelia. There was a brother Jeremiah G. Dow and although the book lists a possible person to be that Jeremiah, it is not certain - so there could be a missing Jeremiah Dow.Brother John Kennedy Dow was supposed to have had 2 daughters and 4 sons, but I see only one dau and she died at age 2.
The book has no mention of a McGlinchey or McClinchey.